Alert archive / Illinois / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 37, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at May 14, 1991, 4:46 PM CDT for Macoupin County, Montgomery County, Sangamon County, Illinois. It was in force for 44 min.
The area
The counties it named.
The facts
- Issued
- May 14, 1991, 4:46 PM CDT (21:46 UTC)
- Expired
- May 14, 1991, 5:30 PM CDT
- In force
- 44 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties Macoupin County, IL, Montgomery County, IL, Sangamon County, IL
The nearest sounding before it
Paducah/Barkley, KY (KPAH), launched 12:00Z, 9.8 hours before the alert went out and 275 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 64 J/kg
- Mixed-layer CIN
- -372 J/kg
- Mixed-layer LCL
- 1288 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, May 14, 1:35 PM CDT, 3 hours 11 minutes before
ILZ005>007-009-141930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 135 PM CDT TUE MAY 14 1991 ...SEVERE THUNDERSTORM WATCH NUMBER 330 IS IN EFFECT UNTIL 6 PM FOR EAST CENTRAL ILLINOIS... INCLUDING MCLEAN COUNTY... AT 1:30 THIS AFTERNOON RADAR INDICATED SHOWERS OVER THE EASTERN HALF OF MCLEAN COUNTY... MOVING EAST AT 15 MPH. ELSEWHERE... A NEW THUNDERSTORM WAS DEVELOPING OVER KNOX COUNTY ABOUT 10 MILES EAST OF GALESBURG. E A COUPLE OF SHOWERS HAD ALSO DEVELOPED IN WESTERN PEORIA COUNTY BETWEEN BRIMFIELD AND PEORIA. MOVEMENT HAD NOT YET BEEN DETERMINED ON THESE NEW SHOWERS AND THUNDERSTORMS BUT THEY ARE PROBABLY MOVING EAST AT 15 TO 20 MPH. JACOBS
Special weather statement, May 14, 2:33 PM CDT, 2 hours 13 minutes before
ILZ005>007-009-142030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 230 PM CDT TUE MAY 14 1991 ...STRONG THUNDERSTORMS IN WESTERN ILLINOIS... STRONG THUNDERSTORMS WITH HEAVY RAIN...AND POSSIBLY SOME HAIL AND BRIEF GUSTY WINDS...WERE NEAR ALTONA...20 MILES NORTHEAST OF GALESBURG AT 225 PM. THE THUNDERSTORMS WERE DRIFTING SLOWLY TO THE NORTH AROUND 15 MPH. HEAVY RAIN ASSOCIATED WITH THESE STORMS MAY RESULT IN PONDING OF WATER OR MINOR FLOODING IN LOW LYING AREAS. THE THUNDERSTORMS ARE EXPECTED TO MOVE NORTH OF KNOX COUNTY BY 300 PM. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR EAST CENTRAL ILLINOIS INCLUDING MCLEAN COUNTY UNTIL 600 PM. THERE HAVE BEEN NO RECENT REPORTS OF SEVERE WEATHER FROM MCLEAN COUNTY. WEATHER SERVICE RADAR AT 225 PM INDICATED AN AREA OF SHOWERS AND THUNDERSTORMS IN EASTERN MCLEAN COUNTY ABOUT 20 MILES EAST OF BLOOMINGTON. THE SHOWERS AND STORMS WERE MOVING EAST AROUND 15 MPH. ~ MILLER
Special weather statement, May 14, 4:18 PM CDT, 28 minutes before
ILZ007-142230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 415 PM CDT TUE MAY 14 1991 ...SEVERE THUNDERSTORM WATCH CANCELLED... THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT FOR EAST CENTRAL ILLINOIS INCLUDING MCLEAN COUNTY HAS BEEN CANCELLED. THE THREAT OF SEVERE WEATHER HAS TEMPORARILY ENDED. ADDITIONAL DEVELOPMENT OF SCATTERED SHOWERS AND THUNDERSTORMS IS EXPECTED IN CENTRAL ILLINOIS TONIGHT. SOME OF THESE STORMS MAY BE SEVERE AND COULD PRODUCE VERY HEAVY RAIN...GUSTY WINDS AND HAIL. PEOPLE IN CENTRAL ILLINOIS ARE ADVISED TO MONITOR THE WEATHER CLOSELY TONIGHT AND STAY TUNED TO RADIO...TELEVISION...OR NOAA WEATHER RADIO FOR LATER STATEMENTS...AND POSSIBLE WATCHES OR WARNINGS. MILLER
Special weather statement, May 14, 4:29 PM CDT, 17 minutes before
ILZ009-10-142200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 430 PM CDT TUE MAY 14 1991 THE SEVERE THUNDERSTORM WATCH FOR CENTRAL AND EAST CENTRAL ILLINOIS HAS BEEN CANCELLED. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF SOUTH CENTRAL ILLINOIS UNTIL 900 PM CDT. AT 420 PM...SHOWERS AND THUNDERSTORMS HAD DEVELOPED OVER WEST CENTRAL ILLINOIS BETWEEN JACKSONVILLE AND SPRINGFIELD. THESE STORMS WERE MOVING SLOWLY SOUTHEAST AT 15 MPH AND PRODUCING HEAVY DOWNPOURS OF RAIN AND DANGEROUS LIGHTNING. OTHER SHOWERS AND SCATTERED THUNDERSTORMS WERE OVER EAST CENTRAL ILLINOIS FROM DANVILLE TO VANDALIA. THESE WERE ALSO MOVING SOUTHEAST AT 15 MPH. PALMER
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 10:38 AM CDT | Tornado Warning | ILX | Tazewell | 67 min |
| May 14, 11:12 AM CDT | Tornado Warning | ILX | DeWitt, Macon | 63 min |
| May 14, 11:14 AM CDT | Tornado Warning | ILX | McLean | 61 min |
| May 14, 12:15 PM CDT | Tornado Warning | ILX | McLean | 35 min |
| May 14, 12:16 PM CDT | Severe Thunderstorm Warning | ILX | Logan, Macon | 59 min |
| May 14, 12:33 PM CDT | Severe Thunderstorm Warning | ILX | Champaign | 57 min |
| May 14, 1:20 PM CDT | Tornado Warning | ILX | Coles, Douglas, Moultrie | 25 min |
| May 14, 2:00 PM CDT | Tornado Warning | ILX | Coles, Douglas, Edgar | 45 min |
| May 14, 2:48 PM CDT | Tornado Warning | ILX | Clark | 27 min |
| May 14, 3:00 PM CDT | Severe Thunderstorm Warning | ILX | Bureau | 60 min |
| May 14, 5:53 PM CDT | Severe Thunderstorm Warning | ILX | Macoupin, Montgomery | 52 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1991Every severe thunderstorm warning in 1991
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.